Couch



May 22, 1928. 1,670,611

E. L. COUCH DI SHWASHING MACHINE Filed Dec. 28, 1922 l 6 Sheets-Sheet l W/TNESSES MW/M4 20 Arm/mns May 22, 192s. 1,670,611

E. L. COUCH DISHWASHING MACHINE Amm/.idg 351 l I' 5" A TTOH/VE YS May 22, 1928. 1,670,611

E. l.. coucH DIsHwAsl-IING MACHINE Filed Deo. 28. 1922 6 Sheets-Sheet 3 ai .1,13 Z6 A TTORNEYS WIT/758858 May 22, 1928.

1,670,611 E. L. COUCH DIsHwAsHING MACHINE Filed Dec. 28. 1922 6 Sheets-Sheet 4 L; fig-4" J f 131 Jr J7 10 Zz kw 110 111 ""S 1 x i A TTOHIV E YS May 22, 1928. 1,670,611

E. L. coUcH DI SHWASHING MACHINE Filed Dec. 28. 1922 6 Sheets-5heet 5 IN VE /V TUR 255ml Coz/CH May 22, 1928. 1,670,611 E. L. cOUcH DISHWASHING MACHINE Filed Deo- 28. 1922 e sheets-sheet e fir fd Jac w/mfssfs nvm/Tof? l ELErL Caz/ch' 3' 2,48 m M, Q

ATTORNEYS Patented May 22, 192s.

f UNITED STATES PATENT OFFICE.

ELBERT L. COUCH, 0F HARTFORD. CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 COUCH DEAN, INCORPORATED, OF NE\VARK,'NEW JERSEY, A CORPORATION OF NEW JERSEY.

DISHWASHING MACHINE.

Application led December 28,1922. Serial No. 609,465.

My invention has tor its object to provide means which will automatically wash, rinse and steam dishes disposed `in a compartment in the machine.

Another object oit the invention is to provide means to supply a sprayer with a fluid in connection with two tanks each of which has means operable one at a time to supply the first means with the Huid.

Another object of the invention is to provide means which will drain a fluid in the washing compartment into the tanks alternately.

Still another object of the invention is vto provide means which will automatically at predetermined intervals introduce a 'fresh fluid into the washing machine which will tlow into the tank containing a rinsing fluid, some of the rinsing lluid being directed periodically into a second tank containing a washing fluid, the overflow from the last mentioned tank flowing to an outlet.

Additional objects of the invention will appear in the following specification in which the preferred form of the invention is described.

ln the drawings similar reference characters refer to similar parts in all the views, in which:

Figure 1 is a. side elevation of the dish washing machine,

Figure 2 is a. rear elevation of Figure l on a smaller scale,

Figure 3 is a similar view on the line 3-8 of Figure 2 but on the same scale used in Figure l of the drawings,

Figure 4 is a sectional View on the line 4% of Figure 3 but on the same scale usedr in Figure 2 of the drawings,

Figure 5 is an enlarged fragmentary sectional view taken :from the rear of the dish washing machine,

Figure 6 is a view showing the front of the washing machine on the same scale as that used in Figure 2 of the drawings,

Figure 7 is a sectional view on the line 7-7 ot Figure 5,

Figure S is a sectional view on the 8--8 of Figure 5,

Figure 9 is a View showing one. of the line cams which are used to operate the valve rods to introduce fresh water and steam into the washing compartment and which opens` the said circuit when the door of the washing compartment is opened, and

Figure 13 is an enlarged fragmentary View illustrating the forward end oit the lock ba r for holding the door closed and for opening the door to the `washing comparte,

ment.

By referring to the drawings, it will hc seen that thereis a washing compa rtment 20 below which there are two tanks 2l and 22 separated by a wall or partition 23. There is an opening 24 in the tank`20 above the wall or partition 23' and as the Washing compartment 21 is wider than the tank 22 it will be understood that the wall or partition 23 and the'opening 24 at the bottom of the washing compartment 2O will be dispartment. rFhe bottom of the washing comn partment 2O is inclined as shown at 25 and Til ,8O posed at one side of the said Washing com 2G tothe said opening 24. Pivoted to the top of the wall or `partition 23 at 27 there` is a flapper valve 28 which extends from the Ytrout to the rear of the tanks 21 and 22 and is disposed to scat at 29 and SOat the bottom ,of the washing compartment 20. Itl

will he seen that when the flapper valve 28 seated at the valve seat 29 that any fluid falling to the bottom of the said Washing compartment 2O will be directed into the tank 2lv which contains a Washing Huid. lVhen the flapper valve 28 is seated at 30 any fluid falling to the bottom oit theiwashing compartment 2() will he directed into the tank 22 which contains a rinsing fluid,

A screen 3l may be disposedin the tank`22 whichr maybe carried by the lwat-er which will flow into the rinsingtank 22. A simi-` lar screen 32 may be disposed on brackets in the tank 2]. which receives the washing fluid.

As will be seen by referring to the draw ings, there is a valve box 33 at the rear of the I tanks 21 and 22. Journaled in bearings in this valve bon 33 thcreis a shaft 34 on Whichare mounted cams 35', 36and 37. The lapper valve 28 is secured to a rock shaft 38, this rock shalt 38 extending into the valve box 33, there being mounted on this rock shaft 38 an arm 39'iw-hich is engaged by the cam 37 and which is periodically raised to move the 'llapper valve 28 `from its seat 30 to its seat 29, a weight 40 being secured to the arm 39 so that the said arm 39 is held yieldingly in its lowermostposition. It will, therefore, bey understood that` with the rotation vor' the shaft `34 that the flapper valve 28 will seat alternately at the valve seats 29 and 30 at predetermined intervals.

The tank 21 has an outlet 41 and, the tank 22 has an `'outlet 42, the outlet 41 being commanded by a valve 43 and the outletk 42 being commanded by af valve 44, these valves 43 and 44 being disposed in the valve bof; 33. The valve 43'has an arm 45 which is pressed against the cam by a spring 46. The valve 44"has a similar arm 47 which is pressed against the cam 36 byk a spring 48. The valve 43 is pivoted to a bracket' at 49 in, the valve box 33 and the valve 44 is pivoted to a bracket at O-in the said valve box. It will, therefore, be seenthat with the rota tion of the shatt 34 not only will the lapper valve 28 be operated at `predetermined in# tervals but that the outlets `41 and 42` in the tanks 21 and 22 will be opened periodi-v cally. l

The cams 35, 36 and 37 are so proportioned `that While the valve 43 isv in the position shovvnin Figure7 to open the outlet 41 from the tank 21 the dapper valve 28 will be in the position shown lin Figure 4 to direct a 4fluid falling at the bottom of the washing compartment 20 into the tank 2l and the lapper valve 28 will remain in this position duringa period of two seconds atter the valve43 is seated to close the outlet 41 and the valve 44 is raised to open the outlet 42.

' This construction is provided so that at each cycle ot operation of the machine some of the fluid in the tank 22 will be conveyed by av means which I will` shortly describe to the washing compartment 2() and will bey directed by the dapper valve 28 4into the tank 21." After the valve 44 has opened the outlet 42' for a period of two seconds the flapper valve 28 will be movedby the means,

the washing compartment 2() during `the remainder of the period that the valve is open will be directed into the tank 22.`

There is an outlet 51 from the valve box 33 to a rotary pump 52 and there is a comnuxnicating ineans-S from the rotary pump y 52 to the casing `54, this casing` `54 communi eating with the interior of the Washing compartment 2() tllrough a sprayer inlet 55 which is journaled in a bearing ,5G4 at the rear of the washing compartment 20.

It will, therefore, be seen that with the rotation of the shaft that the outlet 4l from `that-ank 21 will be opened and the washing fluid contained in the said tank 2l will `be ted to the rotary pump 52 and by the means described the fluid will ybe directed into the washingcompartment 20, this lluid falling to the bottom ot the washing com# partment and beingdirected by the tlapper valve 28 into the tank 21. During this op eration the dishes will be disposed lin the washing)` compartn'ient 2O in any desirable manner, as, for instance in a basket 57.` The washing period will usually last forknine seconds and at the end ot this period the valve 43 will be, closed and the valve 44 l will be opened to cut ott communication between the tank 21 and the rotary pump 52 and to open comn'iunication between the tank 22 and the rotary pump 52. `When the valve 44 has been openediior a.- period ot two sec onds and the fluid from the tank 22Mhas been :forced by the rotary pump 52 into the washing compartment 20 and against the dishes contained therein and ythis tluid has fallen to the bottom of the washingcompartment 2O and into the tank 21 thefitiapper valve 28 willbe moved to the position shown in the dotted lines in Figure 4 ot thel drawings and during the remaining period that the valve 44 is opened the fluid `from the tank 22 will be forced by the rotary pump 52 into the washing compartment 2O and against the dishes, the water lillingz,r `to the bottom ot' `the washing; compartment and being directed by the dapper valve 28 int-o the tank 22. As has been stated, by this construction a portion ol' the water in the tank 22 is transferred to the tank 2]. during` each period that the valve 44 iisopened, the excess or' water in the tank 21 being carried away by the overflow outlet 58. r In the casing 54 there are two valve casings 59 and 60, the valve casing't) being; connected with a fresh water supply 61 and the valve easing;- 60 being' connected with a steam supply 62. The valve casings 59 i and 60 are ot the same ctmstruction and one of' these valve casings is best illustrated lin Figure 10 et the drawings. Each valve casing has an outlet G3 at its bottom which is commanded by a ball valve -64 held yieldingly on its seat by a spring 65, A. rock shaft 66 carries a linger 67 and a hollow rock lou llll

l Sil shaft 68 carries a finger 69, these lingers en gaging the ball valves 64 to raise the ball valves periodically. The shaft 66 is disposed in the hollow rock shaft 68, as best shown in Figure 11 of the drawings. and this hollow rock shaftr 68 is provided with a head 70, with teeth 71 which are engaged by similar teeth on a head 72 mounted on the shaft 66, the head 72 having an arm 73. The shaft 66 has a head 711 beyond the head 72, this head 74 having teeth 75 which are engaged by similar teeth on a head 70 mounted on the shaft 66, the said head '76 having an arm 77, the head 76 being held against the head 74 and the head 74 against the head 72 and the head 72 against the head 70 by means of a nut 78 which meshes with a thread 79 on the shaft 66 and which presses against the head 76. This construction which has been described is provided so that the arm 73 may be positioned relatively to the ball valve operable by the finger 69 and the arm 77 may be adjusted relativelyY to the position of the ball valve operable by the linger 67 to regulate the periods that the said ball valves will be opened by the valve rods provided for engaging the arms 73 and 77. In the pipe 61 which furnishes the fresh water supply there is a check valve 80 and in the pipe 62 which furnishes the steam supply there is a check valve 81.

The rotary pump 52 is mounted on an electric motor shaft 82 connected with the electric motor 83 and on this shaft S2 there is a worm S4 which meshes with aworm gear 85 on a shaft 86. there being a worm S7 on the shaft 86 which meshes with a worm gear 88 on the shaft 3st.v Itwill. therefore. be understood that the rotary pump 52 will rotate at all times during the operation of the washing machine and that by the means described the dapper valve 2S and the valves 43 and @'14 will be operated in the maner and during the periods set forth.

Secured to the shaft 34 beyond the valve box 33 there are cams 89 and 90` the cam S9 operating a. valve rod 91 engaging the arm 73. The cam 90 operates a valve rod 92 engaging the arm 77. The valve rods 91 and 92 are journaled in bearings 93 secured at the rear of the washing con'ipartment 20. The cam 90 is so constructed that it will push upwardly the valve rod 92 for a period of three seconds at the closing of the valve 42 and before the Happel' valve 2S is moved from the position shown in the dotted lines of Figure 4 of the drawings. This will serve to introduce fresh hot water into the washing compartment 20. this hot water owing from the bottom of the washing compartment 20 to the tank 22 to replace that portion of the fluid in the tank 22 which has been transferred to the tank 21 in the manner set forth. On the closing of the valve in the valve casing 59 the cam 89 serves to push upwardly the valve rod 91 to operate by the means described the valve in the Valve casing 60, this serving to introduce into the washing.compartment 20 steam, the cam S9 being so proportioned and the arm 73 being so adjusted as to permit the steam to cnter the washing compartment for a period of `ibou t three seconds. The dishes are steamed to make sure that they will 'dry rapidly and also for sterilizing purposes. v

There is gearing 911 on the sprayer inlet 55 which is engaged by a toothed sector 95 on an arm 96 pivoted at 97 to the rear of the washing machine, this arm 96 having a slot in which is disposed a pin 9S which extends from a disc 99, the dise 99 being secured to a' shaft 100 journalcd in the rear of the washing machine` there being also secured to this shaft 100 a sprocket wheel 101 which is connected with a sprocket wheel 102 by a sprocket chain 103. the sprocket wheel 102 being secured to the shaft- 66. By this means the sprayer inelt will be rocked during the period that the motor is in operation. This sprayer inlet 55 carries radially extending conduits 1011- '.from which extend spraying arms 105 which are closed at their forward ends and which are provided with orifices 106 to direct a fluid from the sprayer' arms 105 inwardly to the dishes disposed in the washing compartment 20. The forward ends of the sprayer arms 105 are connected by a ring 107 which is supported on rollers 10S. At the forward end of the washingr compartment. 20 there is a horizontal roller 109 which assists in introducing the basket containing the dishes into the washing coinpartment, this basket 57 having guideways 110 :for engaging brackets 111 secured to the sides of the washing conipartment 20.

Mounted on the shaft 34 there is a disc 112 carrying a cam 113 for engaging the rod 114-v which is provided with an opening 115 through which the lock bar 11G is disposed, this lock bar 116 having teeth 117 at the opening so that when the rod 114 is held in its lowermost position by means of the spring 118 the lock bar will be locked relatively to the rod 114. This rod 114 is disposed through an opening in a bracket 119 secured at the rear of the washing machine and the spring 118 is secured to the said bracket 119and to the rod 1.14. The lock bar 116 is .disposed through bearings 120 and 121 and a spring 122 is mounted on the lock bar 116 and presses against the bearing 120 and `a pin 123 on the lock bar 116 which serves to move the lock bar 116 forwardly when it is treed from the loop 115 on the rod 111. The forward end of the lock bar 116 has a re-ess 1:21- in which is disposed a flange 125 on the door 126 which is provided for closing the opening at the front of the washing compartment 20.

As will best be seen by referring to F ig- 'end oit the lock bar 116 as the lock bar 116 is moved forwardly. This is shown in the dotted lines in Figure 3 ot the drawings where the flange 125 (in the door 126 is -treed from the recess 1251v so that the door 126 may be opened.

lVhen` the door 126 is closed atteithe dishes in the basket 57 have been introduced into the washing coi'npartinent 2O the flange 125 serves to press rearwardly the lock bar 116, the teeth 117 on the lock bar slipping` through the opening `115 in the rod 11st, it being `possible to adjust the cam 113 to hold the rod 1M in its uppermost position after the operation ot, the machine has been stopped.

On the lock bar 116 there is a switch memyber 129 which closes `contact between the contact members 130 which are connected with the circuit 131 which leads to the electric motor 83, there beingl a hand switch 132 in this circuit.

lVhen the dishes in the basket 57 have y been introduced into the washing compartment 2() and the door 126 has been closech the switch 129 closes the circuit 1231 in the manner described, the switch 132 having; been previously closed lso that the motor 83 will driie the `shaft82and the mechanism connected therewith. Immediately after the operation ot Athe motor 83 the door will be locked by the. movement ot the cam 113 to permit the spring 118 to press the rod 114- downwardly so that the rod 11st at lits opening` 11.5 will engage the teeth to hold the door 126 closed and the switch 129 inposition to connect the Contact members 130. lith the `operation of the motor the washing Huid trom the tank 21 `will be sprayed over the dishes during the period that the sprayer arms 105 are rocked by the means described, this washing operation consuming about nine seronds when the Valve 13 will close the outlet 11 and the Valve l1/1- will open the outlet 42 to rinse the dishes with the Huid contained in the tank 22. Duringthe first two seconds that the valve ha is opened the rinsing liuid will be directed into the rtank21 after which the remainder of the rinsing fluid-will he directed into the tank 22,7 the full rinsing period beingr substantiallytwelve seconds during which the Valve 411 is opened. At the end of this rinsing period the valve 441 is closed and the valve rod 92 will operate the valve in the Valve casing 59 ior a period ot three seconds to introduce iresh hot water into the machine, this water beine,r directed to the .sprayer 105 by the means described and to the tank At the end ot this period of three seconds the valve in the valve casing 59 will close and the nemen tioned period the liapper valve 2S is moved to the position shown by the full linesin Figure l ot the drawings, t

vNot only is the tank 21 `provided with an overflow 5S, but the tank is also provided with a similar overliow 58, one ot these overl'lows being connected. with the other overliow by means of a connecting pipe 58", the two overtlows 58 and 5S leading` by this means to a single outletSC.

Extending downwardly to the tank 22, there being a valve 1311 conlmanding communication through the said pipe 1323. 'lhis valie 134 is operated by the rod 135 which extends to the front of the Ina-7l chine and is provided with a he-adl.` v'vflien the tanks 21 and 22 areempty `they may be lilled by pressing inwardly the head 13o the water iillingr the tank 22 and overilowing into the tank 21.

V1`here is a batileplate 137 ysupported on a` pin 188 held in place by a plate 139 disposed in the casmg and secured to the rear of the washing compartment 20. This baille from the) fresh` water supply 61 there is a pipe 133 leading plate 137 serves to direct the water radially in the conduits 104:.

The door 126 is hinged at 126% ik washing fluid or powder may be sprinlded on the dishes in the basketl 57 before the basket `is introduced into the washing:

compartment 20.

1 claim:

l. 1n a dish washing machine,` a washing conipartment, a tank, a second tank, means to connect the tanks one at a time with the washing:Y co1npartment,1 a pump in the said means, a second means to connect the WashingrA compartment with the iirst tank during the period that the rst tank is connected with the washing compartment by the irst means and to connect the washing compartment with each of the tanks during intervals in the periods when the second tank is connected with the washing compartment by the first means, and automatic means for operating,r the irst two mentioned means.

2. 1n a dish washing machine, a washing compartment, a. tank, a' second tank, means to connect the tanks one at a time with the washing compartment, a pump in the said means, a second means to connect the waslnV ing compartment `with the first tank during the period that the rst tank is connected with the washing compartment by the first means and to connect the Washing compartment with the first and second mentioned tanks one at a time during the period when the second `tank is connected withthe washing compartment by the first means, means to supply the Washing compartment with a fresh fluid during the period that the second mentioned means connects the washing com partment with the second mentioned tank, and an automatic means for operating the first three mentioned means.

3. In a dish washing machine, a washing compartment, a tank, a second tank, means to connect the tanks one at time with the Washing-compartment, a pump in the said means, a second ymeans to connect the Washing compartment with the first tank during the period that the first tank is connected kWith the Washing compartment by the first rmeans and to connect the washing compartment with each of the tanks during intervals in the periods when the second tank is connected with the Washing compartment by the first means and automatic means to suplydthe Washing compartment with a fresh 4. In a dish Washing machine, a sprayer, a tank, a second tank, means to connect the tanks with the sprayer one at a time, a pump in the said means, means to direct a fluid from the sprayer into the tanks, means independent `of the tanks to supply the sprayer with a fresh fluid, a driving means for the pump, and automatic means operable by the said driving means for operating the first three mentioned means.

5. In a dish washing machine, a sprayer, two tanks, means to connect the tanks With the sprayer one at a time, a pump in the said means, means to direct the Huid from the sprayer into the tanks one at a time, means to supply the sprayer with Ia fresh fluid during the period that the Huid from the sprayer is directed to one of the tanks, and automatic means for operating the first threementioned means.

6. In a dish washing machine, a Washing "compartment, a pump connected With the Washing compartment, a tank, a second tank, means to connect the tanks Withthe pump one at a time, and a second means to connect the Washing compartment with the first tank during the period that the first tank is connected with the pump and to connect the washingcompartment with the first tank and subsequently with the second tank duringv the period that the second tank is connected with the pump.

,. 7. In a dish Washing machine, al washing compartment, a pump connected with the washing compartment, a tank, a second tank,

meansto connect the tanks with the pump during t-he period that the rst tank is connected with the pump and to connect the Washing compartment with the first tank and subsequently with the second tank during the period that the second tank is connected with the pump, and means to supply the Washing compartment with a tresh fluid during the period that thefwashing compartment is connected with the second mentioned tank.

8. In a dish washing machine, a Washing compartment, a tank, a second tank, the tanks being disposed vbelow the Washing compartment, means to connect the tanks one at a time with the washing compartment, a pumpA in the said means, means to connect the washing compartment with the first tank during the period that the first tank is connected with the washing compartment and to connect the washing compartment with the lirst tank and later with the second tank during the period that the second tank is connected with the washing compartment by thc lirst mentioned means, and mea-ns to introduce a Jfresh liquid into the washing compartment after the second means connects the washing compartment with the second mentioned tank.

9. In a, dish washing machine, a washing compartment, a tank, a second tank, means to connect the tanks one at a time `with the washing compartment, a pump in the said means, means to connectthe washing compartment with the first tank during the period that the first tank is connected with the washing compartment and to connect the washing compartment with the first tank and later with the second tank during the period that the second tank is connected with the washing compartment by the first mentioned means, means to introduce a fresh liquid into the washing compartment after the second means connects the washing compartment with the second mentioned l tank, means to introduce steam into the washing compartment after the operation of the third mentioned means, driving means for the pump and means actuated by the driving means for operating the first four mentioned means.

10. In a dish washing machine, a tank, a second tank.y each tank having an outlet, valves at the outlets, a washing compartment disposed over `the tanks and having an outlet at its bottom, a valve to direct a fluid from the Washing compartment outlet into either of the tanks, a pump, communicating means connecting the tank outlets with the pump and the pump with the Washing compartment, means to operate the valve at the first tank to directa fluid to the pump, means to operate the valve at the second tank to direct a fluid to the pump from the second tank, and means to operate the third valve to direct a iuid from the washing compartment into the 'first tank when lthe iirstrmentioned means isin operative post tion and to direct a iuid from the Washing compartment into the tanks during inter- Yvalves one at `each outlet, a Washing compartment disposed over the tanks and liav inganoutlet at itsbottom, a valve to direct a iuid :trom'tlie washing compartment outlet into either of the tanks, a pump, coniiiiimicating means connecting the tank `outlets `with the pump and the pump with `the 'Washing compartment, an inlet in the communicating means, means to operate the valve at the first tank to direct iiuid `to the pump, means to operate the valve at the second tank to direct a iiuid to the pump 'from the second tank, means to operate the third mentioned valve to direct fluid from `the Washing; `con'ipartment into the first tank when the iirst mentioned means is in operative position and to direct iiuid from the Washing compartment into the tanks one at a time duringthe period When the second mentioned means is in operative position, and. means to supply the-inlet with a i'rcsh fluid While the third i'nentioned valve directs a, fluid from the Washing compartment into the second tank.

l2. In a dish Washing machine, a tank, a"

. to direct fluid to the pump from the second tank, means to operateithe third valve to di- `rect fluid from the Washing compartment into the iirst tank `when the first mentioned means is in operative position and to direct fluid trom the washing compartment into the iii-st tank and subsequently into the second tank when the second mentioned means is inoperative position, an inlet in the com mimicating means and means to supply the inlet with a luid during the period when the third valve directs the iuid `from the Washing compartment into the second. tank.

13. In a dish Washing machine, a tank, a

second tank, eacli tank having an outlet, tvvo valves, one at each outlet, awashing compartment disposed over the tanks and having an' outlet at its bottom, a valve to direct a fluid from the Washing compartment outlet into either `of the tanks,` a pump, communi- `eating means connectingl the tank outlets Let/ami with the pump and the pump with the Wash ing compartment, means to operate the valve i at the iirst tank to direct a Huid to thepump, means to operate the valve at the second tank to dir et a fluid to the pump, mea-ns to op crate the third valve to direct fluid Viromthe Washing compartment into the first tank` when the first mentioned means is inoperative position` and to direct fluid from the` washingcompartment into the tanks one at a 1 time when the second mentioned means is in t operative position, two inlets connected with the communicating means, means tosupplyv one ot the inlets with a fresh liquid, means to supply the `other inlet with` steam, a

le. ln dish Washing machine, a Washing` f compartment having an opening, a ,door for closing the opening, two tanks, a pump,`

means adapted to connect the tanks with the the valve leadingfrom pump one at atii'ne, aconnnunicating` means connecting the pump withthe Washing 1Comi partnient, an inlet in the communicatin means, a valve cominandinia;theiinlen an means operable byfthe door tork actuating1 i the liist mentioned means and the valves:

l5. In a dish Washing machine, two tanks,

,each tank having anoutlet, two valves', one

at each outlet', a vvashingcompartment `diefposed over the tanks and havingfanopening and an outlet, a door for closing theopen` ing, `a valve orgdirecting la iuidii'om` the Washing compartment outlet into either of:

the tanks, a pump, communicating means connecting the tank outlets With the pump and thev pump` with `the Washing lcom art-,i

ment, means to operate the valves perio ical-l ly and to operate thepnmp,and 4means actui ated by the `door for operating 'the second mentioned means. f f

16. In a dish` Wasliingmachine,two tanks,` i

a washing compartment having an opening,`

communicating means to connect thetanks;

with the Washing ,comp'artnienu` a pump in the communicatingmeans, two valves at the` tanks in the communicating means,means to connect the Washing compartmentwithj the` tanks, a valve in the second mentioned means, a door `tor closing the opening inthe washing compartment, and meansadapted to be actuated by the door for operating;

the valves0 17. ln a dish Washing machine, two tanks, each tankhaving an outlet, tivo valves onu at each outlet, a Washing compartment` having an opening, a pump, a communicating means connecting the outlets Withtne pump and the'pumpfwitli the Washing compania-H `nient, a communicating means connecting the washing compartment with the tanks, a valve in the second communicating means, a door for closing the opening in the Washing compartment, means adapted to be actuated by the closing of the door to operate the valves and means to move the third mentioned means into inoperative position on the completion of a cycle of operation.

18. In a dish washing machine, a washing compartment having an opening, a door for closing the opening, two tanks, means to connect theV tanks alternately with the washing compartment, a pump in the said means, a second means to connect the tva-Shing compartment with the tanks alternately, electrical driving means for the pump, a circuit connected with the electrical driving means, means operable by the electrical driving means 'for actuating the first and second. mentioned means, and means for breaking the circuit and opening the door when the electrical driving means has been in operation a predetermined time.

ELBERT L. COUCH. 

